Slag-heating apparatus.



Patented Sep-t. I6, |902. J. A. POTTER. l

S. U Ml. 1 Rw 6 J A1 7 I Pv An n J G mm a HY Tn, 1 E4 Am J En 1 ...n.m Gm 6 .J S

J M d 0 M o m l WITNESSES UNITED STATES PATENT OFFICE.

JOHN A. POTTER, OF PHILADELPHIA, PENNSYLVANIA.

SLAG-HEATING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 709,112, datedSeptember 16, 1902.

Application i'lled July 8l 1901. Serial No. 67,397. (No model.)

To all whom t may concern:

Be it known that I, JOHN A. POTTER,of Philadelphia, Philadelphia county,Pennsylvania, have invented a new and useful Slag- Heating Apparatus, ofwhich the following is a full, clear, and exact description, referencebeing had to the accompanying drawinggforming part of thisspecification, in which the figure is a sectional side elevation showingone form of apparatus constructed in accordance with my invention.

My invention relates to the utilizing of the heat contained in moltenslag for the heating of other iluids--such as, water, air, &c.; and itsobject is to provide a simple and effective apparatus in which theoperation may be carried on continuously and economically.

In the drawing, in which I show my invention as applied to asteam-boiler, I show the boiler as composed of inner and outer shells 2andV 3, which are preferably circular in cross section, the outer shellbeing cylindrical, while the inner one tapers upwardly, being ofconsiderably larger diameter at the bottom than at the top, so that itscross-sectional area increases downwardly. Inletchutes 4 are providednear the upper endv of the inner shell and which are preferably inclineddownwardly and inwardly from two or more sides, as shown, and open intothe inner shell, so that molten slag may be dumped therethrough into theinner shell. These chutesl may be provided with suitable closing-doors5, which may be hinged and lifted by counterweighted chains 6, leadingover pulleys, as shown', or by any other suitable means. The annularspace between the inner and outer shells is closed at the bottom, wherethe boiler is supported upon a suitable base 7, this base-frameworkbeing open and free below the inner shell, except for a lower cross-bar8, arranged to support the column of slag when the inner chamber isopened at the bottom. The bottom of the inner shell is closed by areciprocatory shearblade 9, which moves in suitable guides and isprovided with a shearing front edge. This shear-blade is reciprocated byconnection with the piston or plunger of a hydraulic cylinder 10 or byother suitable connections. Beneath the boiler is a pit arranged tocontain a slag-car 11, which may be carried on a wheeled truck 12,traveling on the track 13.

14 is the water-inlet pipe for the boiler, and 15 the blow-off pipe. Thesteam is taken out through the usual dry-pipe 16, and to allow theescape of any gases which may be thrown off by the slag I preferablyprovide a valved pipe 17, which leads upwardly from the inner shellthrough the top of the boiler and is provided above with ahand-controlled valve 18, as shown. As the slag may stick in the lowerpart of the slag-chamber, I provide poke-holes 19, which are preferablyinclined downwardly.

In the operation of the boiler a column of slag is maintained within theinner shell, successiye additions of liquid slag being made wheneverdesirable through the upper inlets and at desirable intervals, theshear-blade is retracted, the column of slag dropped down upon thecross-bar, and the shear-blade is then forced forward, thus cutting offthe protruding cooled portion of the slag column and closing the lowerend of the slag-chamber. The cut-off portion is broken up and droppedinto the slag-car to be taken away to the dump. The inner shelltherefore contains at all times a column of slag, the upper part ofwhich may be liquid, and grading from this condition down through asemiliquid or pasty condition to the bottom part of hardened andsolidified slag.

The boiler is used in the ordinary manner, the water-level beingpreferably kept somewhat above the upper end of the inner shell, asshown in the drawing.

The advantages of my invention result from the using of thevertically-extending column of slag, to which liquid additions are madeat the top and successive portions of which are sheared off at thebottom. Each addition of slag thus remains within the boiler a sufcientlength of time for the utilization of the major portion of its containedheat, and economy is thus given, while the operation is simple andeasily carried out. The downwardly-enlarging form of the slagchamberprevents sticking and jamming of the column and the shear-blade acts asaclosure and also as shearing mechanism for cutting off the successiveportions of the column.

IOC)

Many changes may be made in the form and shape of the heater, air may beforced through the annular space between the inner and outer shellsinstead of using water, and many other changes may be made in the formand arrangement of the parts without departing from my invention asclaimed.

I claiml. A slag-heater containing an inner vertically-extendingslag-chamber, a shear-blade closing the lower end of said chamber,mechanism for reciprocating said shear-blade, and a stop or supportbelow the blade and arranged to support the slag colu mn with a portionthereof protruding below the slag-chamber; substantially as described.

2. In a slag-heater, a hollow shellarranged to contain a fluid to beheated, and having an inner vertically-extending slag-ch am ber,feedopenings leading through the hollow shell to the slagchamber,shearing mechanism arranged to cut oi successive lower portions of theslag column and means for supporting the Slag column with its lowerportion protruding downwardly below the slag-chamber; substantially asdescribed.

3. In a slag-heater, a hollow shell containing a vertically-extendingslag-chamber, a shearfknife arranged to close the lower end of thechamber, mechanism forreciprocatin g the knife, a stop or supportarranged to stop the column of slag with its lower portion projectingbelow the chamber, and a slag-receptacle below the said knife;substantially as described.

4. Aslag-heatercontainingaslag-chamber, the cross-sectional area ofwhich increases downwardly, means for supporting a slag column with itslower end portion projecting below the chamber, and a movable shearbladearranged to close the lower end of the chamber; substantially asdescribed.

5. In a steam-boiler, a hollow double shell containinganinnervertically-extendingslagchamber, slag-chutes leading through theouter shell to the upper part of the inner shell, a shear-blade arrangedto close the lower end of the slag-chamber, a supportarranged to hold aslag column with its lower` portion below the lower end of the chamber,and mechanism for reciprocating the shear-blade, said boiler havingsteam and Water connections; substantially as described.

In testimony whereof I have hereunto set my hand.

JOHN A. POTTER.

Witnesses:

GEO. B. BLEMING, JOHN MILLER.

